One vertex per element, one color per generator, with an edge from x to x·s.
(9,10,14,17)(11,18,21,15)(12,16,22,13)(19,23,24,20)(25,26)(27,36)(28,41)(29,35)(30,32)(31,45)(33,40)(34,43)(37,51)(38,53)(39,46)(42,49)(44,48)(47,55)(50,52)(54,56)(1,2)(3,7)(4,6)(5,8)(9,11,14,21)(10,15,17,18)(12,19,22,24)(13,23,16,20)(26,32)(27,37)(34,41)(35,45)(38,52)(39,40)(48,49)(54,55)(1,3)(2,5)(4,8)(6,7)(9,12)(10,16)(11,19)(13,17)(14,22)(15,20)(18,23)(21,24)(25,27,29,39,30,37,31,40)(26,33,45,51,32,46,35,36)(28,38,44,55,43,52,42,54)(34,47,48,53,41,56,49,50)(3,8)(5,7)(10,17)(12,22)(15,18)(19,24)(25,28)(26,34)(27,38)(29,44)(30,43)(31,42)(32,41)(33,47)(35,49)(36,50)(37,52)(39,55)(40,54)(45,48)(46,56)(51,53) involution — undirected(2,6)(5,7)(9,13,14,16)(10,12,17,22)(11,20,21,23)(15,24,18,19)(25,29,30,31)(26,35,32,45)(27,39,37,40)(28,42,43,44)(33,36,46,51)(34,48,41,49)(38,54,52,55)(47,53,56,50)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.